Just my experience. Ive tried 2s with a mage and druid (resto/boom). and cant even get 1800. I have nearly full wrathful including shoulders/wep. All of my partners had atleast full relentless.
However, in 3s and 5s I'm just facerolling with any comp I want. My newest 3s team just went somthing like 35 wins before we lost and we were running disc/rogue/ele. Thats a pretty random comp Imo. Nevertheless we got 2k in one week.
It seems to me like we just need a healer AND somebody to hold the kill target in place for a while.
Maybe I'm not playing with the right partner but pretty much every team we play (regardless of comp) just sits on me and interupts every cast I try (or reflects) and I can literally do nothing. In 3s though I have dispells and peels, then I can actually cast and lolfaceroll.
I hear holy pally is a god 2s for an ele, anybody have any experience above 2k as ele that could help me out?